A geometric view of global signal confounds in resting-state functional MRI
نویسندگان
چکیده
منابع مشابه
Towards a consensus regarding global signal regression for resting state functional connectivity MRI
The number of resting state functional connectivity MRI studies continues to expand at a rapid rate along with the options for data processing. Of the processing options, few have generated as much controversy as global signal regression and the subsequent observation of negative correlations (anti-correlations). This debate has motivated new processing strategies and advancement in the field, ...
متن کاملFunctional Connectivity Alterations in Epilepsy from Resting-State Functional MRI
The study of functional brain connectivity alterations induced by neurological disorders and their analysis from resting state functional Magnetic Resonance Imaging (rfMRI) is generally considered to be a challenging task. The main challenge lies in determining and interpreting the large-scale connectivity of brain regions when studying neurological disorders such as epilepsy. We tackle this ch...
متن کاملA Randomized Global Signal Regression Method for Resting State Functional Connectivity Studies
INTRODUCTION: The presence of negative correlations between the default mode network (DMN) and the dorsal attention network (also known as the task positive network (TPN) [1] has been a subject of recent controversy in the resting-state functional MRI (fMRI) literature. It has been suggested that the negative correlations could be an artifact caused by global signal regression performed during ...
متن کاملHead Motion and Correction Methods in Resting-state Functional MRI
Resting-state functional magnetic resonance imaging (RS-fMRI) is used to investigate brain functional connectivity at rest. However, noise from human physiological motion is an unresolved problem associated with this technique. Following the unexpected previous result that group differences in head motion between control and patient groups caused group differences in the resting-state network w...
متن کاملInterpreting temporal fluctuations in resting-state functional connectivity MRI
Resting-state functional connectivity is a powerful tool for studying human functional brain networks. Temporal fluctuations in functional connectivity, i.e., dynamic functional connectivity (dFC), are thought to reflect dynamic changes in brain organization and non-stationary switching of discrete brain states. However, recent studies have suggested that dFC might be attributed to sampling var...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: NeuroImage
سال: 2012
ISSN: 1053-8119
DOI: 10.1016/j.neuroimage.2011.09.018